Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 132,306	$ 139,741
Marketable securities	246	245
Accounts receivable, net of allowance for doubtful accounts of $15 and $120, respectively	19,248	30,384
Other receivables	15,175	12,572
Inventories	3,155	4,176
Prepaid expenses and other assets	2,352	3,507
Total current assets	172,482	190,625
Property and equipment, net of accumulated depreciation	810	918
Intangible assets, net of accumulated amortization and impairment charges	184,753	190,335
Goodwill	18,044	17,960
Other assets	25,304	19,211
Total assets	401,393	419,049
Current liabilities:
Accounts payable and other accrued liabilities	47,503	56,539
Accrued payroll and benefits	4,555	8,188
Deferred revenue	1,312	6,130
Drug development liability	156	259
Acquisition-related contingent obligations	6,000	5,227
Total current liabilities	59,526	76,343
Drug development liability, less current portion	14,354	14,427
Deferred revenue, less current portion	1,596	383
Acquisition-related contingent obligations, less current portion	1,708	1,439
Deferred tax liability	6,849	6,779
Other long-term liabilities	8,109	7,444
Convertible senior notes	100,933	99,377
Total liabilities	$ 193,075	$ 206,192
Commitments and contingencies
Stockholders’ equity:
Preferred stock	$ 0	$ 0
Common stock, $0.001 par value; 175,000,000 shares authorized; 68,942,042 and 68,228,935 shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively	68	68
Additional paid-in capital	555,056	552,108
Accumulated other comprehensive loss	(3,485)	(5,319)
Accumulated deficit	(343,444)	(334,123)
Total stockholders’ equity	208,318	212,857
Total liabilities and stockholders’ equity	401,393	419,049
Series B junior participating preferred stock [Member]
Stockholders’ equity:
Preferred stock	0	0
Series E Convertible Voting Preferred Stock [Member]
Stockholders’ equity:
Preferred stock	$ 123	$ 123